Chapter 14
... The preceding chapters have traced the story of stars from their birth as clouds of gas in the interstellar medium to their final collapse. This chapter finishes the story by discussing the kinds of objects that remain after a massive star dies. How strange and wonderful that we humans can talk abou ...
... The preceding chapters have traced the story of stars from their birth as clouds of gas in the interstellar medium to their final collapse. This chapter finishes the story by discussing the kinds of objects that remain after a massive star dies. How strange and wonderful that we humans can talk abou ...
Phys 214. Planets and Life
... Young Sun had a strong solar wind, blowing off particles from its surface out into space. The wind swept away the remaining gas into the interstellar space, ending the era of planet formation. ...
... Young Sun had a strong solar wind, blowing off particles from its surface out into space. The wind swept away the remaining gas into the interstellar space, ending the era of planet formation. ...
Chapter 15 Stars, Galaxies, and Universe Galaxies
... In 1965, two American physicists accidentally detected faint radiation on their radio telescope. This mysterious glow was coming from all directions in space. Scientists later concluded that this glow, called cosmic background radiation, is the leftover energy from the big bang. ...
... In 1965, two American physicists accidentally detected faint radiation on their radio telescope. This mysterious glow was coming from all directions in space. Scientists later concluded that this glow, called cosmic background radiation, is the leftover energy from the big bang. ...
Brown_Dwarfs
... • If it is of lower mass (M<13 Jupiter Masses), the brown dwarf will never undergo fusion. It will relatively quickly radiate its thermal energy away over the course of tens of millions of years. Eventually the brown dwarf will cool below an effective temp of 2500k and clouds of silicate crystals wi ...
... • If it is of lower mass (M<13 Jupiter Masses), the brown dwarf will never undergo fusion. It will relatively quickly radiate its thermal energy away over the course of tens of millions of years. Eventually the brown dwarf will cool below an effective temp of 2500k and clouds of silicate crystals wi ...
ch 15 notes
... In 1965, two American physicists accidentally detected faint radiation on their radio telescope. This mysterious glow was coming from all directions in space. Scientists later concluded that this glow, called cosmic background radiation, is the leftover energy from the big bang. ...
... In 1965, two American physicists accidentally detected faint radiation on their radio telescope. This mysterious glow was coming from all directions in space. Scientists later concluded that this glow, called cosmic background radiation, is the leftover energy from the big bang. ...
supplemental educational materials PDF
... Science Institute are astronomers. Astronomers from all over the world use the Hubble Space Telescope. ...
... Science Institute are astronomers. Astronomers from all over the world use the Hubble Space Telescope. ...
Classifying Stellar Spectra
... We have learned that astronomers classify stars by their spectra. The particular spectral class of a star tells us the star's surface temperature. In this activity, you will take part in a project called Stellar Classification Online Public Exploration (SCOPE). Follow the directions below to take pa ...
... We have learned that astronomers classify stars by their spectra. The particular spectral class of a star tells us the star's surface temperature. In this activity, you will take part in a project called Stellar Classification Online Public Exploration (SCOPE). Follow the directions below to take pa ...
Student Exploration Sheet: Growing Plants
... Introduction: Late in the 19th century, Harvard astronomer Edward Pickering wanted to sort and catalog the thousands of star spectra that had been collected by the Harvard Observatory. He hired several women to do the work, paying them 25 cents a day. The most prominent of these women was Annie Jump ...
... Introduction: Late in the 19th century, Harvard astronomer Edward Pickering wanted to sort and catalog the thousands of star spectra that had been collected by the Harvard Observatory. He hired several women to do the work, paying them 25 cents a day. The most prominent of these women was Annie Jump ...
Problem Set 1, due Sep 4
... Exercising on flat ground is easier than climbing a hill because by climbing we must convert some food energy to energy. ...
... Exercising on flat ground is easier than climbing a hill because by climbing we must convert some food energy to energy. ...
Folie 1 - astro.uni
... How does it depend on the initial conditions? What are the main phases of planet formation? Which physics governs each phase? What are the expected properties of planetary systems? Can we explain the properties of the solar system? Can we explain diversity of planetary systems? Are there planetary s ...
... How does it depend on the initial conditions? What are the main phases of planet formation? Which physics governs each phase? What are the expected properties of planetary systems? Can we explain the properties of the solar system? Can we explain diversity of planetary systems? Are there planetary s ...
The Universe - The Ohio State University
... thermal histories. Photons present at that time have been propagating ever since, though growing fainter and less energetic, since the exact same photons fill a larger and larger universe. This is CMB radiation or CMBR. Hence the CMB is a picture of the universe at the end of the recombination epoch ...
... thermal histories. Photons present at that time have been propagating ever since, though growing fainter and less energetic, since the exact same photons fill a larger and larger universe. This is CMB radiation or CMBR. Hence the CMB is a picture of the universe at the end of the recombination epoch ...
the submissions here
... On a clear day we see a blue sky since blue wavelengths are scattered in all directions by the atmosphere. However, during a sunset, the light rays have to travel much further. In this case, the blue rays have already scattered, and only the longer red and yellow rays reach our eyes. ...
... On a clear day we see a blue sky since blue wavelengths are scattered in all directions by the atmosphere. However, during a sunset, the light rays have to travel much further. In this case, the blue rays have already scattered, and only the longer red and yellow rays reach our eyes. ...
mass loss and stellar evolution
... • Because of clumping, mass-loss rates for line-driven winds have been revised downward by an order of magnitude. • Thus, line-driven winds on the main-sequence are vastly insufficient to remove the H envelope and produce WR stars (MWR20 M)…best alternative is that LBV eruptions dominate the mass ...
... • Because of clumping, mass-loss rates for line-driven winds have been revised downward by an order of magnitude. • Thus, line-driven winds on the main-sequence are vastly insufficient to remove the H envelope and produce WR stars (MWR20 M)…best alternative is that LBV eruptions dominate the mass ...
Stellar Astrophysics: Introduction Q. Daniel Wang Astronomy Department University of Massachusetts
... Stars are mostly steady, spending most of their lifetime converting H into He. Mostly forces are balanced between gravity - only the mass within r matters and acts as if it is at the center of a star (the gravitational potential is different). I pressure - most importantly its differences between th ...
... Stars are mostly steady, spending most of their lifetime converting H into He. Mostly forces are balanced between gravity - only the mass within r matters and acts as if it is at the center of a star (the gravitational potential is different). I pressure - most importantly its differences between th ...
The Milky Way Galaxy 1 Introduction 2 Globular Clusters and
... What are some of the properties inferred about dark matter? What are some candidates for dark matter? ...
... What are some of the properties inferred about dark matter? What are some candidates for dark matter? ...
Astrophysics 14 - Black Holes
... • Supposed we have an object of mass, m on the surface of a more massive object of mass M. • How do we calculate the kinetic energy and gravitational potential energy of mass m. ...
... • Supposed we have an object of mass, m on the surface of a more massive object of mass M. • How do we calculate the kinetic energy and gravitational potential energy of mass m. ...
Weighing a Galaxy—11 Nov Ast 207 F2005 Nov-09 • Schedule
... 1. What are the fossils (something that can be examined) from the universe at 3 min? 2. The amount of helium in the sun depends on the properties of deuterium. If deuterium is less tightly bound, would there be more or less helium on the surface of the sun? ...
... 1. What are the fossils (something that can be examined) from the universe at 3 min? 2. The amount of helium in the sun depends on the properties of deuterium. If deuterium is less tightly bound, would there be more or less helium on the surface of the sun? ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.